Europe...listen to the wisdom of Calvin Coolidge

I assimilated.

Europe, as well as the American Left, would do well to heed Calvin Coolidge's wisdom. Just insert "Europe or Europeans" in place of "America or Americans". 

“We are all agreed, whether we be Americans [Europeans] of the first or of the seventh generation on this soil, that it is not desirable to receive more immigrants than can reasonably be assured of bettering their condition by coming here. For the sake both of those who would come and more especially of those already here, it has been thought wise to avoid the danger of increasing our numbers too fast. It is not a reflection on any race or creed. We might not be able to support them if their numbers were too great. In such event, the first sufferers would be the most recent immigrants, unaccustomed to our life and language and industrial methods. We want to keep wages and living conditions good for everyone who is now here or 
who may come here."